Ranger HRC™ operator´s manual – System operation
Publ. No. TM 614 006 699 Rev B – ENGLISH (EN) – Oct 30. 2008 139
11.3 IR image
Frequently used features for control of the IR image can be executed with
the Joystick Control Unit JCU) or via the System Software menu system,
as described in the sections below.
Detailed instructions for optimization of the IR image are provided in
chapter 12.
11.3.1 NUC
NUC Non-Uniformity Correction) is a function that performs an internal
calibration of the IR Camera.
NUC can be performed in three different ways. With Internal NUC, the
image is calibrated against a shutter inside the camera. With External
NUC, either the lens cover or the scene is used as thermal reference.
The normal procedure is to start with an Internal NUC. If an acceptable
image quality is not achieved, an External NUC against the lens cover or
against the scene may improve the image.
NOTE: When the camera is started, a NUC is needed every 5 minutes. After about 30
minutes, a NUC is only needed when the quality of the image is degenerated.
Internal NUC
Step Action
1
Press the
NUC button < 1 second to perform an Internal NUC.
NOTE: If the default setting for the NUC button has been changed (Setup- Image
dialog box, see section 7.6.1.1), the
NUC button shall be pressed > 1 second to
perform an Internal NUC.
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